Town Car V8-4.6L VIN W (1997)
Service Port HVAC: Description and Operation
The high-side fitting is the largest. Special couplings are required to connect service equipment to both the high-side and low-side service ports.
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Quick disconnects must be used to connect a manifold gauge set to the system.
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Always install the A/C charging valve caps on the service access gauge port valves after servicing the refrigerant system.
The service gauge port valves are either a one-piece or two-piece design:
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In the two-piece design, the aluminum top portion of the valve is threaded to the bottom part and sealed with an O-ring seal. The valve seal is an
integral part of the aluminum fitting piece which must be replaced if the seal leaks.
